Combination hoist



March 25, 1924 1,488,187 F. R. ZIMMERMAN COMBINATION HOIST Filed Feb. 6, 1923 2 Sheets-Sheet 1 March 25 1924.

F. R. Z |MMERMAN COMBINATION HOIST- Filed Feb. 6, 1923 2 Sheets-Sheet 2 Patented Mar. 25, E924.

insures srarss PATENT @FLFHQE.

FRANK R. ZIMMERMIAN, OF SUPERIOR, WISCONSIN, ASSIGNOR TO SUPERIOR IRON WORKS COMPANY, OF SUPERIOR, WISCONSIN, A CORPORATION OF i/VISCONSIN.

COMBINATION HOIST.

Application filed February 6, 1923. Serial No. 617,416.

hoisting device particularly adapted for use on ore docks or the like where a major and minor hoisting device are desirable.

On ore dock structures it is common to have individual hoisting devices mounted upon the upper deck of the clock for raising and lowering the spoutsthereof, and the principal object of my present invention is to cooperatively unite with such hoisting unit an auxiliary hoisting mechanism for raising and lowering the doors controlling the discharge of material into said spouts.

Another object is to provide automatic means for the partial control of such door operating device.

Other objects and advantages of the invention will appear in the further descrip tion thereof.

Referring now to the accompanying drawings in which like numerals indicate like parts:

Figure 1 is a side elevation of one of the combination hoisting devices,

I Figure 2 i a general line elevation of the upper portion of an ore dock showing the relative position of the combination hoist thereupon,

Figure 3 is a front outline elevation of one of the combination hoists,

Figure 4 is a central vertical sectional view, partly in elevation, of the auxiliary portion of the hoisting device, taken on the line 4.4, Figure 1, and

Figure 5 is a top plan view of the auxiliary hoist.

1 represents the upper deck of an ore dock, 2 the side walls thereof, and 3 the bottom of a pocket at the lower extremity of which is pivotally mounted the ore spout 4 for conducting ore from the pocket into a vessel or the like. These ore spouts are commonly raised and lowered by a line 5 leading to the hoisting mechanism 6, the frame of which is indicated at 7 mounted upon the upper deck of the dock, there being one such hoisting device for each spout. These hoisting devices are mounted upon and derive their power from a horizontally disposed line shaft 8. I have illustrated the minor or door operating hoists connected upon the major hoisting device which is equipped with three short shafts disposed parallel with the line shaft, and are numbered 9, 10 and 11. The shaft 9 is spaced above the line shaft 8, the shaft 10 being spaced horizontally back of the shaft 9, and the shaft 11 still farther back and slightly below all of the other shafts, they all being rotatably mounted within the frame 7 except the haft 9 which is stationary.

In mounting the minor hoist upon this structure the shafts 9, 10 and 11 are made sufiiciently long to extend laterally from the side of the frame 7 upon which the minor hoist is mounted, and, upon the line shaft 8 adjacent the side of the hoist from which these shafts protrude, is mounted a female clutch disc 12, it being securely fixed to the line shaft so as to constantly rotate therewith. A like female disc member 13 is spaced therefrom around the line shaft 8 but upon a longitudinally movable elongated sleeve 14, said sleeve extending towards the clutch disc 12 and across the space intermediate of the discs. This sleeve also extends in the opposite direction beyond the hub portion 15 of the disc 13 and upon which extension it carries a radially disposed twin arm support 16, by which it is oscillated. The disc 13 is further spaced by an arm 17 having a hub portion 18 surrounding the shaft 9 thus to prevent any rotation of said disc as it i desired to be stationary. This disc is further securely held against rotation or longitudinal movement upon the shaft 8 by two spacing bolts 19, they being engaged within the oppositely disposed lugs 20 formed integral with the peripheral wall of the disc 13 and extending to and securely fastened to the frame 7 of the major hoist. Within opposite sides of the hub portion 15 of the friction disc 13 is formed an elongated through slot 21 posi tioned slightly diagonaaly transverse the axis of the hub. lladially projecting pins 22 are securely fixed within the sleeve 14 and protrude through the slots 21 providing means whereby when the sleeve 14: is rotated the frictional engagement of the pins 22 in the slots 21 will impart longitudinal movement of the sleeve upon the line shaft 8.

intermediate of the disc members 12 and i3 and rotatably carried within the reduced portion 23 or the sleeve ii is the elongated double cone clutch 2%, having formed gear teeth about its central reduced barrel portion intermediate the cone ends. Meshing with the gear is the large spur gear 26 loosely mounted upon the extension of the shaft 9 of the major hoist and this gear carries upon its inwardly projecting elongated hub 2? the spur gear 28 which meshes with and drives the still larger spur gear 29 loosely mounted upon the extension of the shaft 10 of the major hoist. Upon the elongated hub 30 of the said gear, intermediate of which and the frame of the hoist, is wound the door controlling line 31.

The line 31 extends downwardly from the drum through the elongated hole 32 in the arm of the bell crank lever 3 L pivotally mounted upon the extension of the shaft 11 of the major hoist.

The bell crank lever has a somewhat abnormally elongated hub portion from the outer end ofwhich upwardly extends the arm 35, upon its free end pivotally carrying, as at 36, one end of the horizontally disposed forwardly extending arm or rod 37. The opposite end of the rod is pivotally attached as at 38 to the upright lever socket of the arm support 16-, the object of which will be apparent later.

In this socket is rigidly fixed the upstanding manually operated lever 39 by which the hoisting action of the device is controlled.

In the other angularly disposed socket of the support 16 is similarly securely attached the counterweight arm l0 adj usta'oly carrying adjacent its free end the counterweight il. Now this counterweight constantly exerts downward stress upon the arm at tending to rotate the sleeve 1 L backwardly, or normally ieeping said sleeve in its extreme anti-clocliiwise position as viewed in Figure 1, that is with the conical clutch member 2-itightly impinging the stationary friction disc 13 thus holding the auxiliary hoisting mechanism against rotation.

Now when it becomes desired to raise the door 42 for discharging the contents of the pocket, the hand lever 39 is drawn on pushed forwardly to rotate the sleeve 14 in a clockwise direction, thus forcing the cone clutch member against the rotating disc 12, it being remen'ibered that this disc is constantly rotating with the line shait Thus the entire door hoisting mechanism is set in motion, winding up'the line 31 until pcrzulventure the lever 39 is held sligthly too long. when as an automatic safety means the bah e-S fixed at a prcdcternined station on the line ill w ll engage the d pressed arm 33 and bell l l raise it thus inih anu stall-ti;- reversing the manually held position of the lever through the connection previously described. his will throw the hoist out of action by the withdrawing of the sleeve l t, this automatic action working in harmony with the graritating action of the counterweight and which latter force, if permitted to do so, will iiil'llliQl' withdraw the clutch 24iback to its normal frictional engagement with the disc where it is thus braked,resulting in the door bein now held open or in its fully elevated position. 7

When it is desired to again lower the door d2 all that is necessary is to manually pull the lever only partially in its operative osition, and such action will bring the c-utch 24 in neutral position intermediate of the discs 12 and 13, allowing free rotative action thereof and permitting the door to close by its own gravity.

From the foregtnng it is evident that l have devised an exceedingly simple and practical auxiliary door controlling mechanism in combination with a spout hoist admirably adapted for ore docl: installations, but it is to be understood that this invention is not confined to this particular form of installation, as some of the appended claims clearly cover a combination hoisting mechanism that may be used for various purposes.

Having thus described my invention, what I claim and desire to secure by Letters Patent, is: V

1. The combination with a spout hoist of the character described having three shafts protruding from one side thereof, said hoist being driven by a line shaft, of manually controlled power transmitting means upon the line shaft, a spout door operating line winding drum loosely mounted upon one of the protruding shafts of the hoist, power transmit-ting means intermediate of the drum and the manually controlled means upon another of the protruding shafts, gra ity means mounted upon the line shaft for auxiliary control of the first mentioned power transmitting means, and means mounted upon the third protruding shaft of the spout hoist in cooperative engagement with the door controlling line for automatic action of the first mentioned power transmitting means.

2. The combination with a door hoist of the character described optionally operable from a line shaft including a power transmitting means mounted upon the line shaft and a line winding drum operated by the power transmitting means, of gravity means for auxiliary control of the power transmitting means, and means intermediate of the power transmitting means and the hoisting line operated by the latter for augmenting the action of the gravity means.

3. A hoist of the type described comprising in combination a power shalt, two spaced female friction discs about said shaft one being rigidly lined thereto, a reciprocable sleeve about the shaft carrying the other disc, means for preventing the rotation of said disc, an internal double clutch carried by said sleeve intermediate of the discs and alternately engageable therewith, a hoisting drum, means intermediate of the clutch and the drum for operating the latter by the former, means for engaging or disengaging the clutch with the discs for controlling the action of the drum.

4. A. hoist of the type described comprising in combination a power shaft, two spaced female friction discs about said shaft one being rigidly fixed thereto, a reciproca-ble sleeve about the shaft carrying the other disc, means for preventing the ro tation of said disc, an internal double clutch carried said sleeve intern'iediate of the discs and alternately engageable therewith, a hoisting drum, means intermediate of the clutch and the drum for operating the latter by the former, means for engaging or disengaging the clutch with the discs for con trolling the action of the drum, and means for automatically stopping the action of the drum at any predetermined point desired.

In testimony whereof l hereunto ailix my signature in the presence of two witnesses.

FR-i'llll' R. ZIlilMERMAl'l. Witnesses S. C. BRONSON, S. GEO. STEVENS. 

